Hair straightener with flat sides



FIG. 1 is a front, top, and right side perspective view of a hair straightener with flat sides showing our new design;

FIG. 2 is a rear, bottom, and left side perspective thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a rear elevation thereof;

FIG. 6 is a left side elevation thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for a hair straightener with flat sides, as shown and described. 